hey, Chris... i'm sure it's difficult to "pull the trigger." and perhaps you are not up for taking consolation in that:

a. you are young
b. you have no children yet

when you love somebody and want to be with that person, those things don't seem to matter... but if she puts her desires away to be with you, those desires may come back later in life--when you do have children... when you've invested 20 years...

is she open to your walking away? what does she want for you?